CN219950279U - Power distribution system of hoisting equipment - Google Patents
Power distribution system of hoisting equipment Download PDFInfo
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- CN219950279U CN219950279U CN202321292474.9U CN202321292474U CN219950279U CN 219950279 U CN219950279 U CN 219950279U CN 202321292474 U CN202321292474 U CN 202321292474U CN 219950279 U CN219950279 U CN 219950279U
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- current contactor
- power supply
- driving
- alternating current
- alternating
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- 230000003068 static effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
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- Control And Safety Of Cranes (AREA)
Abstract
The utility model discloses a power distribution system of hoisting equipment, which comprises a main loop, wherein the main loop comprises a three-phase power supply (L1, L2 and L3), a driving alternating current contactor group and a motor M which are arranged in a connecting way; an auxiliary alternating-current contactor KM is further arranged between the driving alternating-current contactor group and the three-phase power supply (L1, L2 and L3); a height limit switch K1 is also arranged between the constant voltage power supply and the driving alternating current contactor group; and a scram switch K2 is also arranged between the constant voltage power supply and the driving alternating current contactor group, and the scram switch K2 is connected with the auxiliary alternating current contactor KM. By additionally arranging the auxiliary three-phase alternating current contactor in the main loop and additionally arranging the emergency stop switch on the control loop, the safety accident during driving can be reduced when the driving alternating current contactor group is adhered.
Description
Technical Field
The utility model relates to the field of power distribution control of lifting equipment, in particular to a power distribution system of the lifting equipment.
Background
The ac contactor is one of the main electric components in the automatic control, and its failure rate is very natural, and the motor is often burnt out due to the failure of the adhesion of the moving and static contacts of the ac contactor. The main reason for the adhesion of the moving and static contacts of the AC contactor is that when the motor controlled by the AC contactor is powered off, the generated arc burns the moving and static main contacts. The magnitude of the electric arc depends on the current magnitude of the motor, whether the current exceeds the rated current of the alternating current contactor, and the more the current exceeds, the more the electric arc burns the moving and static main contacts. When the silver element of the metal material of the movable and static contacts of the alternating-current contactor is reduced to a certain degree, and serious uneven and concave surfaces appear on the surfaces of the movable and static main contacts, the movable and static main contacts can be adhered when the current carried by the movable and static main contacts is far lower than rated current. This phenomenon often occurs in a frequently operated, fast reversing control system. Such as a crane, a forward and reverse running device, etc.
As shown in fig. 1, in a conventional power distribution circuit of a traveling crane (hoisting equipment), a three-phase power supply is directly connected with a three-phase ac contactor KM1 or KM2, and in a control loop thereof, a constant-voltage power supply and a K1 height limit switch are connected in series with the three-phase ac contactor KM1 or KM 2. In the use process of the control power distribution crane (hoisting equipment), when the crane runs up and down, the three-phase alternating current contactor KM1 or KM2 sometimes has adhesion, at this time, the alternating current contactor KM1 or KM2 is not controlled by a remote controller, even if a K1 height limit switch is disconnected, the control is also uncontrolled, and safety accidents are caused by direct up or direct down.
Disclosure of Invention
The utility model aims to solve the problem that safety accidents occur due to adhesion of an alternating current contactor in the existing power distribution circuit of travelling crane (lifting equipment), and provides a power distribution system of the lifting equipment.
A lifting device power distribution system comprising
The main loop comprises a three-phase power supply (L1, L2, L3), wherein the three-phase power supply (L1, L2, L3) is connected with a driving alternating current contactor group, and the driving alternating current contactor group is connected with a motor M;
an auxiliary alternating-current contactor KM is further arranged between the driving alternating-current contactor group and the three-phase power supply (L1, L2 and L3);
the control loop comprises a constant voltage power supply, the constant voltage power supply is connected with the driving alternating current contactor group, and a height limit switch K1 is arranged between the constant voltage power supply and the driving alternating current contactor group;
and a scram switch K2 is also arranged between the constant voltage power supply and the driving alternating current contactor group, and the scram switch K2 is connected with the auxiliary alternating current contactor KM.
Further, the driving ac contactor group includes a first ac contactor KM1 and a second ac contactor KM2, and the first ac contactor KM1 and the second ac contactor KM2 are connected in parallel.
Further, the emergency stop switch K2 is a normally open switch.
The beneficial effects of the utility model are as follows: by additionally arranging the auxiliary three-phase alternating current contactor in the main loop and additionally arranging the emergency stop switch on the control loop, when the driving alternating current contactor group is adhered, the driving is directly on or directly down to the K1 height limit switch to be disconnected, and the emergency stop switch is a normally open switch, so that the driving alternating current contactor group can be cut off, and the safety accident during driving use is reduced.
Drawings
FIG. 1 is a schematic diagram of a conventional crane power distribution circuit;
FIG. 2 is a schematic diagram of a travelling crane power distribution circuit of the system;
Detailed Description
Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.
It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present utility model by way of illustration, and only the components related to the present utility model are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.
Example 1
As shown in fig. 2, the power distribution system of the hoisting equipment comprises a main loop, wherein the main loop comprises a three-phase power supply (L1, L2, L3), the three-phase power supply (L1, L2, L3) is connected with a driving alternating current contactor group, and the driving alternating current contactor group is connected with a motor M; specifically, the three-phase power supplies (L1, L2 and L3) adopt 380V alternating current power supplies.
In this scheme, the driving ac contactor group includes a first ac contactor KM1 and a second ac contactor KM2, and the first ac contactor KM1 and the second ac contactor KM2 are connected in parallel. The first alternating current contactor KM1 and the second alternating current contactor KM2 are arranged and used for controlling travelling crane to ascend or descend.
An auxiliary alternating-current contactor KM is further arranged between the driving alternating-current contactor group and the three-phase power supply (L1, L2 and L3);
the control loop comprises a constant voltage power supply, wherein the constant voltage power supply is a 36V constant voltage power supply, the constant voltage power supply is connected with the driving alternating current contactor group, and a height limit switch K1 is arranged between the constant voltage power supply and the driving alternating current contactor group; and a scram switch K2 is also arranged between the constant voltage power supply and the driving alternating current contactor group, and the scram switch K2 is connected with the auxiliary alternating current contactor KM. The emergency stop switch K2 is a normally open switch.
The work flow of the power distribution system comprises the following steps:
when the first alternating-current contactor KM1 and the second alternating-current contactor KM2 in the driving system are adhered, the height limit switch K1 is in a closed state, and when the driving system is at a certain height, the height limit switch K1 is in an open state, and the emergency stop switch K2 is a normally open switch, so that the auxiliary alternating-current contactor KM, the first alternating-current contactor KM1 and the second alternating-current contactor KM2 are all cut off, and the occurrence of safety accidents during driving is reduced.
After the fault of the power distribution system is repaired, the emergency stop switch K2 is turned on, so that the traveling crane descends, at the moment, the height limit switch K1 is turned on, and after the power distribution system is recovered to be normal, the emergency stop switch K2 is turned off. Through the setting of this scheme, improved driving distribution system device, improved the safe function of using of driving, reduced the security risk in the driving use.
The foregoing examples merely illustrate specific embodiments of the utility model, which are described in greater detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.
Claims (3)
1. A lifting device power distribution system, characterized by: comprising
The main loop comprises a three-phase power supply (L1, L2, L3), wherein the three-phase power supply (L1, L2, L3) is connected with a driving alternating current contactor group, and the driving alternating current contactor group is connected with a motor M;
an auxiliary alternating-current contactor KM is further arranged between the driving alternating-current contactor group and the three-phase power supply (L1, L2 and L3);
the control loop comprises a constant voltage power supply, the constant voltage power supply is connected with the driving alternating current contactor group, and a height limit switch K1 is arranged between the constant voltage power supply and the driving alternating current contactor group;
and a scram switch K2 is also arranged between the constant voltage power supply and the driving alternating current contactor group, and the scram switch K2 is connected with the auxiliary alternating current contactor KM.
2. A lifting device power distribution system as recited in claim 1, wherein: the driving alternating-current contactor group comprises a first alternating-current contactor KM1 and a second alternating-current contactor KM2, and the first alternating-current contactor KM1 and the second alternating-current contactor KM2 are connected in parallel.
3. A lifting device power distribution system as recited in claim 1, wherein: the emergency stop switch K2 is a normally open switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321292474.9U CN219950279U (en) | 2023-05-25 | 2023-05-25 | Power distribution system of hoisting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321292474.9U CN219950279U (en) | 2023-05-25 | 2023-05-25 | Power distribution system of hoisting equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219950279U true CN219950279U (en) | 2023-11-03 |
Family
ID=88551794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321292474.9U Active CN219950279U (en) | 2023-05-25 | 2023-05-25 | Power distribution system of hoisting equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219950279U (en) |
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2023
- 2023-05-25 CN CN202321292474.9U patent/CN219950279U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 564104 Dazhai, Huangjiaba Town, Meitan County, Zunyi City, Guizhou Province Patentee after: Yatai Yuantong Electric Power Co.,Ltd. Country or region after: China Address before: 564104 Dazhai, Huangjiaba Town, Meitan County, Zunyi City, Guizhou Province Patentee before: Guizhou Yatai Yuantong Electric Co.,Ltd. Country or region before: China |